JAMB Physics 2010 Objective — Question 46
Question 46 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2010 Objective paper, with the correct answer and a full explanation.
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46. The radioisotope 235/92 U decays by emitting two alpha particles, three beta particles and a gamma ray. What is the mass and atomic numbers of the resulting daughter element? A. 91 and 227 B. 92 and 238 C. 227 and 91 D. 215 and 88
- A. 91 and 227
- B. 92 and 238
- C. 227 and 91Correct
- D. 215 and 88
Explanation
235-2(4)-3(0)=227 (mass number). 92-2(2)-3(-1)=91 (atomic number). The resulting daughter element has mass number 227 and atomic number 91.
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